Your Marriott Bonvoy Member Number is the 12-digit code that identifies your account in the Bonvoy loyalty program

Your Marriott Bonvoy Member Number is a unique 12-digit identifier assigned to you when you open a Bonvoy account. You use it to earn and redeem points at participating Marriott properties worldwide, link your hotel card to your account, and track your progress toward elite status. The number stays the same for the life of your account, even if you change your name, email, or password.

You will see this number on your Bonvoy membership card (physical or digital), in your account dashboard, and on hotel receipts after you check in. If you have a Marriott hotel card, your Member Number is already linked to that card automatically — the two are connected, not separate.

Key Takeaways

  • Your Member Number is a 12-digit code you receive when you create a Bonvoy account, and it appears on your membership card and in your online account.
  • You can find your number by logging into your Bonvoy account online, checking your membership card, or calling Marriott customer service.
  • Your hotel card is linked to your Member Number at the time of approval, so you do not need to link them separately.
  • You provide your Member Number at check-in to earn points on your stay, even if you paid with a different card.

Where to Find Your Member Number

The fastest way to locate your number is to log into your Bonvoy account at bonvoy.marriott.com. Once you are signed in, your Member Number appears in the upper right corner of the dashboard, next to your name. It is also displayed in the "Account" or "Profile" section if you click on your account settings.

If you have a physical Marriott Bonvoy membership card, the 12-digit number is printed on the front, usually below your name. A digital version of this card is available in the Marriott Bonvoy mobile app — read the app, sign in with your account credentials, and your Member Number will appear on the digital card.

If you do not have access to your account or card, you can call Marriott Bonvoy customer service at the number on the back of your hotel card, or contact the hotel directly during your stay. They will verify your identity and provide your number.

How Your Hotel Card and Member Number Connect

When you are approved for a Marriott hotel card, the card issuer automatically links it to your Bonvoy Member Number. You do not need to do anything extra — the connection happens behind the scenes. This means points you earn from card spending and hotel stays are deposited into the same Bonvoy account.

If you already had a Bonvoy account before opening the card, your new card is linked to that existing account. If you did not have an account yet, one is created for you at the time of card approval, and your Member Number is assigned then.

You can have only one active Bonvoy account per person. If you somehow end up with two accounts, you will need to contact Marriott to merge them — points cannot be transferred between separate accounts.

Using Your Member Number When You Stay at a Hotel

Provide your Member Number at check-in to earn points on your room rate. You can give it verbally, show your membership card, or provide it when you book your reservation online. The hotel will record it in their system, and points will post to your account within a few days of checkout.

Your Member Number works the same way regardless of which card you used to pay. If you booked with your Marriott hotel card, you earn card benefits plus Bonvoy points. If you booked with a different card or paid cash, you still earn Bonvoy points as long as you provided your Member Number.

If you forget to give your Member Number at check-in, you can usually add it after the fact by contacting the hotel or logging into your Bonvoy account and looking for a "missing stay" option. Some properties allow you to claim a stay up to 30 days after checkout.

What Happens If You Lose or Forget Your Number

Losing your Member Number is not a problem — it is tied to your account, not to a physical card. As long as you can log into your Bonvoy account with your email and password, you can retrieve your number anytime. If you have forgotten your password, use the "Forgot Password" link on the Bonvoy website to reset it.

If you cannot access your account, call Marriott Bonvoy customer service. They will ask you to verify your identity using your name, date of birth, and the email address on file. Once verified, they will provide your Member Number and help you regain access to your account.

Protecting Your Member Number

Your Member Number is not secret in the way a password is — hotels and Marriott staff see it regularly. However, you should not share it with anyone outside of a Marriott property or official Marriott communication. Do not provide it in response to unsolicited emails or phone calls claiming to be from Marriott.

If you believe your account has been compromised — for example, if you see points missing or unfamiliar activity — log into your account and change your password when ready. Then contact Marriott customer service to report the issue. They can review your account history and reverse unauthorized transactions.

Frequently Asked Questions

Can I change my Member Number?

No, your Member Number is permanent and cannot be changed. It is assigned when your account is created and stays with your account for life. If you want a fresh start, you would need to close your account and create a new one, but you would lose all accumulated points and elite status.

What if I have multiple Marriott hotel cards?

All of your Marriott hotel cards are linked to the same Member Number and the same Bonvoy account. Points from all cards deposit into one account. You can have more than one card, but they all feed the same loyalty account.

Do I need my Member Number to book a hotel online?

You can book without providing your Member Number, but you should include it at checkout so points are credited to your account. If you forget, you can add it after booking by logging into your Bonvoy account and updating the reservation.

Will my Member Number work at all Marriott properties?

Your Member Number works at all properties that participate in the Bonvoy program, which includes most Marriott, Sheraton, Westin, Renaissance, and other brands under the Marriott umbrella. A small number of properties may not be part the program — check the property details when you book to confirm.

What if I want to combine points from an old Bonvoy account with a new one?

You cannot transfer points between accounts yourself. Contact Marriott Bonvoy customer service and explain that you have two accounts. They can review your situation and may be able to merge the accounts if you can verify ownership of both.